/*
 * # iohao.com . 渔民小镇
 * Copyright (C) 2021 - 2023 double joker （262610965@qq.com） . All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.iohao.game.common.kit.system;

import lombok.AccessLevel;
import lombok.Getter;
import lombok.experimental.FieldDefaults;

/**
 * @author 渔民小镇
 * @date 2023-01-19
 */

@Getter
@FieldDefaults(level = AccessLevel.PRIVATE)
public class OsInfo {
    final String osName = InternalSystemPropsKit.get("os.name", false);
    final boolean linux = getOsMatches("Linux") || getOsMatches("LINUX");
    final boolean mac = getOsMatches("Mac") || getOsMatches("Mac OS X");


    private boolean getOsMatches(String osNamePrefix) {
        if (osName == null) {
            return false;
        }

        return osName.startsWith(osNamePrefix);
    }


    private OsInfo() {

    }

    public static OsInfo me() {
        return Holder.ME;
    }

    /** 通过 JVM 的类加载机制, 保证只加载一次 (singleton) */
    private static class Holder {
        static final OsInfo ME = new OsInfo();
    }
}
